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UNITED STATES Pnfrnn'r Orricn.

EDMUND TWEEDY, OF DANBURY, CONNECTICUT, AND HENRY L. BREVOORT AND ISAIAHL. ROBERTS, OF BROOKLYN, NEYV YORK.

PROCESS OF TREATlNG FUR TO PREPARE IT FOR FELTING.

SPZ'EGIFECATION forming part of Letters Patent No. 339,354, dated April6, 1886.

Application filed December 22, 1885.

.To aZZ whom it may concern:

Be it known that we, EDMUND TWEEDY, a resident ofthe town of Danbury, inthe county ofFairfield and State of Connecticut, and HEN- RY L.Bnnvoonrr and ISAIAH L. RoBERrs, residents of the city of Brooklyn,county of Kings, and State of New York, and all citizens of the UnitedStates, have invented a new and useful Improvement in Processes forTreating For in to Prepare it for Felting, of which the following is aspecification.

We have already applied for patents describing the treatment of for withprepared oxidizing-fumes in order to put the furin such con- 1 ditionthat it may subsequently be felted, and we have described methods ofcarrying out in practice our inventions.

WVe have since discovered that the action of the prepared oxidizingvapors or fumes is much increased if, after they are prepared, they aremingled with aqueous vapor, either above or below the boiling-point ofwater.

In carrying out our present invention we manufacture nitric or nitrousfumes prefera- 2 bly, though other oxidizing-fumes can be used, and weintroduce with them into the chamber or receptacle containing the fur ajet of steam, or we produce aqueous vapor in the chamber itself byheating preferably boiling water in a 0 vessel therein, and we comminglethe aqueous vapor and the prepared oxidizing-fumes either before or atthe time the fumes come in contact with the fur. By so doing we findthat the act-ion of the fumes upon the fur is hastened or increased inpower, and the period of treatment may be thus reduced. V. e do notSerial No. 186,482. (No specimens.)

confine ourselves to any precise proportion of vapor and fumes, as abeneficial effect is attained even with a small percentage of aque ousvapor. Of course the proportion of aque- 40 cos vapor could be increasedso much that it would dilute the oxidizing-fumes so as to prevent orimpair their proper action, and this must be avoided. One part,bybulk,of oxidizing-fumes to, say, from one-fourth ('1) to one- 5 half(-1-) their bulk of aqueous vapor constitutes a good mixture.

Our theory is that the artificial supply of moisture enables theoxidizing fumes to perform their oxidizing function more rapidly orenergetically, and in practice it certainly hastens the treatment.

Whether our theory is correct or not, the beneficial results abovedescribed will be attained by following the directions given in thespecification.

What we claini,and desire to secure by Let ters Patent, is-

As an improvement in the art of treating fn r with oxidizing-vapors toadapt it for felt- 6o ing, the process which consists in preparingoxidizing fumes or vapors from proper material or materials, and inmixing the said vapors with the vapor of water, and submitting the forto the action of the coniniinglcd vapors, substantially as described.

EDMUND T\VEEDY.

HENRY L. BREVOORT.

ISAIAH L. tOBERTS.

Vitnesses:

B. T. VnrrEnLnIx, A. J. LE'HMAN.

